Apparently the Riot Club is (loosely?) based on the real-life Oxford Bullingdon Club, which has had some (in)famous members like PM David Cameron and London Mayor Boris Johnson. It’s that kind of background that brings a level of interest to the movie: the first half or so the boys do an excellent job portraying themselves as proudly priviliged and spoilt twats that you love to hate. And that makes you wonder whether such people and behaviour still exists in the upper echelons of the British social hierarchy.
There is a healthy sub-genre of British Cinema that celebrates the quirkiness of the Brits, their subcultures and their local communities. Combine that with a backdrop of economic hardship, an abundance of prejudice, and a dash of politics and you get a very funny movie like Pride.